I missed 8 very important points
What are you towing with ?
What actually is the tongue weight ?
What does the trailer weigh ?
Are you towing at or near level ?
From nose to tail of the
body only what is the length ?
From centerline of tire (dust cap ) to tail what is this measurment.
Is the galley heavily or lightly appointed and stocked?
Tongue box or not ? ( probably not the stock tongue is too damn short )
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I just lengthened mine and I really wish I had taken 2 minutes to drag out the bathroom scales and checked before and after !
After the tongue was lengthened 18" it actually seemed lighter as I lifted it up but this makes no sense. I can only attribute this to leverage a longer lever means less work to lift.
Here are the pics of my tongue repair
Chubby tows much nicer now and backing up is a breeze. I have now done this with all 3 of my tiny trailer and the 2x2 1/4 runs front to rear the rear was drilled and shimmed slightly to accept a 1 1/4 class 2 drawbar so accessories can be mounted at the rear.